diff --git a/.claude/settings.json b/.claude/settings.json
new file mode 100644
index 0000000..fa7924c
--- /dev/null
+++ b/.claude/settings.json
@@ -0,0 +1,16 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(grep -rln *)",
+      "Bash(grep -nA12 '\\\\[project.optional-dependencies\\\\]\\\\|optional-dependencies\\\\|\\\\[dependency-groups\\\\]' pyproject.toml)",
+      "Bash(grep -vE \"^$\")",
+      "Bash(git ls-tree *)",
+      "Bash(grep -E '\\\\.py$')",
+      "Bash(grep -v '\\\\.sample$')",
+      "Bash(git config *)",
+      "Bash(command -v gh)",
+      "Bash(gh api *)",
+      "Bash(python3 -c \"import sys,json; d=json.load\\(sys.stdin\\); print\\('protected:', d.get\\('protected'\\)\\); p=d.get\\('protection',{}\\); print\\('required_pull_request_reviews:', 'yes' if p.get\\('required_pull_request_reviews'\\) else 'no'\\); print\\('enforce_admins:', \\(p.get\\('enforce_admins'\\) or {}\\).get\\('enabled'\\)\\)\")"
+    ]
+  }
+}
diff --git a/README.md b/README.md
index 462c65b..8ffa3f5 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,7 @@ authorization and authentication based on a TDEI/Keycloak JWT token (see main.py
 
 ## Branch Index
 
-* ```develop``` do your work here
-* ```development``` keep this up to date with the "development" environment / dev tag
+* ```develop``` merge your work here; keep this up to date with the "development" environment / dev tag
 * ```staging``` keep this up to date with the "staging" environment / stage tag
 * ```production``` keep this up to date with the "production" environment / prod tag
   
diff --git a/alembic_task/versions/b3f8a2c91e04_add_auto_flag_review.py b/alembic_task/versions/b3f8a2c91e04_add_auto_flag_review.py
index 2aeb46a..f0b39ba 100644
--- a/alembic_task/versions/b3f8a2c91e04_add_auto_flag_review.py
+++ b/alembic_task/versions/b3f8a2c91e04_add_auto_flag_review.py
@@ -10,6 +10,7 @@
 
 import sqlalchemy as sa
 from alembic import op
+from sqlalchemy import inspect
 
 revision: str = "b3f8a2c91e04"
 down_revision: Union[str, None] = "add6266277c7"
@@ -17,7 +18,20 @@
 depends_on: Union[str, Sequence[str], None] = None
 
 
+def _has_column(name: str) -> bool:
+    """True if `workspaces.<name>` already exists.
+
+    Guards the add/drop so the migration is safe whether or not the column
+    was created out-of-band (e.g. by a parallel branch) — a plain
+    ``ADD COLUMN`` would raise ``DuplicateColumnError`` otherwise.
+    """
+    insp = inspect(op.get_bind())
+    return name in {c["name"] for c in insp.get_columns("workspaces")}
+
+
 def upgrade() -> None:
+    if _has_column("autoFlagReview"):
+        return
     with op.batch_alter_table("workspaces", schema=None) as batch_op:
         batch_op.add_column(
             sa.Column(
@@ -30,5 +44,7 @@ def upgrade() -> None:
 
 
 def downgrade() -> None:
+    if not _has_column("autoFlagReview"):
+        return
     with op.batch_alter_table("workspaces", schema=None) as batch_op:
         batch_op.drop_column("autoFlagReview")